Abstract.
The mirror nuclei 25Mg and 25Al are expected to have very similar structures. The Gamow-Teller (GT) transitions from the \(J^{\pi} = 5/2^{ + }\) ground state of 25Mg to the excited states in 25Al were studied by high-resolution measurements of the 25Mg(\(^3{\rm He},t\)) charge-exchange reaction at \(0^{\circ}\) and at 140 MeV/nucleon. Assuming the usual \(\Delta J^{\pi} = 1^{ + }\) selection rule for the spin-isospin-type GT transitions, the states with \(J^{\pi} = 3/2^{ + }, 5/2^{ + }\), and 7/2 + should be excited. However, of the more than ten states with these \(J^{\pi}\) values below 6 MeV excitation energy, only the 5/2 + ground state and the 7/2 + , 1.613 MeV state in 25Al were strongly populated, while all other states were strongly suppressed. The analysis of M1 transitions in 25Mg also suggested a very similar feature for the analogous M1 transitions. Both 25Mg and 25Al are known to be largely deformed, and most low-lying states can be interpreted in terms of one-particle quantum numbers in the deformed potential and the associated rotational spectra. The observed suppression can be explained in terms of the K quantum number selection rules that are inherent to axially deformed nuclei.-1
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References
F. Osterfeld, Rev. Mod. Phys. 64, 491 (1992) and references therein.
J. Rapaport, E. Sugarbaker, Annu. Rev. Nucl. Part. Sci. 44, 109 (1994).
A. Bohr, B. Mottelson, Nuclear Structure II (Benjamin, New York, 1975) and references therein.
P. Raghavan, At. Data Nucl. Data Tables 42, 189 (1989).
M. Guttormsen, T. Pedersen, J. Rekstad, T. Engeland, E. Osnes, F. Ingebretsen, Nucl. Phys. A 338, 141 (1980).
A.E. Litherland, H. McManus, E.B. Paul, D.A. Bromley, H.E. Gove, Can. J. Phys. 36, 378 (1958).
F. Heidinger, P. Betz, W. Brendler, F. Glatz, A. Hoffmann, H. Röpke, B.H. Wildenthal, Z. Phys. A 338, 23 (1991).
Y. Fujita, Y. Shimbara, I. Hamamoto, T. Adachi, G.P.A. Berg, H. Fujimura, H. Fujita, J. Görres, K. Hara, K. Hatanaka, J. Kamiya, T. Kawabata, Y. Kitamura, Y. Shimizu, M. Uchida, H.P. Yoshida, M. Yoshifuku, M. Yosoi, Phys. Rev. C 66, 044313 (2002).
P.M. Endt, Nucl. Phys. A 521, 1 (1990)
L.W. Fagg, W.L. Bendel, E.C. Jones jr., H.F. Kaiser, T.F. Godlove, Phys. Rev. 187, 1384 (1969).
E.K. Warburton, J. Weneser, Isospin in Nuclear Physics, edited by D.H. Wilkinson (North-Holland, Amsterdam, 1969), Chapt. 5, and references therein.
H. Morinaga, T. Yamazaki, In Beam Gamma-Ray Spectroscopy (North-Holland, Amsterdam, 1976) and references therein.
W.G. Love, M.A. Franey, Phys. Rev. C 24, 1073 (1981).
M. Fujiwara, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, K. Hatanaka, H. Ikegami, I. Katayama, K. Nagayama, N. Matsuoka, S. Morinobu, T. Noro, M. Yoshimura, H. Sakaguchi, Y. Sakemi, A. Tamii, M. Yosoi, Nucl. Instrum. Methods Phys. Res. A 422, 484 (1999).
T. Noro , RCNP (Osaka University), Annual Report, 1991, p. 177.
Y. Fujita, K. Hatanaka, G.P.A. Berg, K. Hosono, N. Matsuoka, S. Morinobu, T. Noro, M. Sato, K. Tamura, H. Ueno, Nucl. Instrum. Methods Phys. Res. B 126, 274 (1997) and references therein.
T. Wakasa, K. Hatanaka, Y. Fujita, G.P.A. Berg, H. Fujimura, H. Fujita, M. Itoh, J. Kamiya, T. Kawabata, K. Nagayama, T. Noro, H. Sakaguchi, Y. Shimbara, H. Takeda, K. Tamura, H. Ueno, M. Uchida, M. Uraki, M. Yosoi, Nucl. Instrum. Methods Phys. Res. A 482, 79 (2002).
H. Fujita, Y. Fujita, G.P.A. Berg, A.D. Bacher, C.C. Foster, K. Hara, K. Hatanaka, T. Kawabata, T. Noro, H. Sakaguchi, Y. Shimbara, T. Shinada, E.J. Stephenson, H. Ueno, M. Yosoi, Nucl. Instrum. Methods Phys. Res. A 484, 17 (2002).
Y. Fujita, H. Fujita, G.P.A. Berg, K. Harada, K. Hatanaka, T. Kawabata, T. Noro, H. Sakaguchi, T. Shinada, Y. Shimbara, T. Taki, H. Ueno, M. Yosoi, J. Mass Spectrom. Soc. Jpn. 48, 306 (2000).
H. Fujita, G.P.A. Berg, Y. Fujita, K. Hatanaka, T. Noro, E.J. Stephenson, C.C. Foster, H. Sakaguchi, M. Itoh, T. Taki, K. Tamura, H. Ueno, Nucl. Instrum. Methods Phys. Res. A 469, 55 (2001).
C.D. Goodman, C.A. Goulding, M.B. Greenfield, J. Rapaport, D.E. Bainum, C.C. Foster, W.G. Love, F. Petrovich, Phys. Rev. Lett. 44, 1755 (1980).
T.N. Taddeucci, C.A. Goulding, T.A. Carey, R.C. Byrd, C.D. Goodman, C. Gaarde, J. Larsen, D. Horen, J. Rapaport, E. Sugarbaker, Nucl. Phys. A 469, 125 (1987) and references therein.
W.G. Love, K. Nakayama, M.A. Franey, Phys. Rev. Lett. 59, 1401 (1987).
Y. Fujita, H. Akimune, I. Daito, H. Fujimura, M. Fujiwara, M.N. Harakeh, T. Inomata, J. Jänecke, K. Katori, A. Tamii, M. Tanaka, H. Ueno, M. Yosoi, Phys. Rev. C 59, 90 (1999).
Y. Fujita, Y. Shimbara, A.F. Lisetskiy, T. Adachi, G.P.A. Berg, P. von Brentano, H. Fujimura, H. Fujita, K. Hatanaka, J. Kamiya, T. Kawabata, H. Nakada, K. Nakanishi, Y. Shimizu, M. Uchida, M. Yosoi, Phys. Rev. C 67, 064312 (2003).
DW81, a DWBA computer code by J.R. Comfort (1981) and updated version (1986), an extended version of DWBA70 by R. Schaeffer, J. Raynal (1970).
Y. Fujita, B.A. Brown, H. Ejiri, K. Katori, S. Mizutori, H. Ueno, Phys. Rev. C 62, 044314 (2000) and references therein.
J.P. Boisson, R. Piepenbring, Nucl. Phys. A 168, 385 (1971).
A. Arima, K. Shimizu, W. Bentz, Advances in Nuclear Physics, edited by J.W. Negele, E. Vogt, Vol. 18 (Plenum, New York, 1987) p. 1, and references therein.
I.S. Towner, Phys. Rep. 155, 263 (1987).
A. Richter, A. Weiss, O. Häusser, B.A. Brown, Phys. Rev. Lett. 65, 2519 (1990).
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Communicated by J. Äystö
Received: 18 July 2003, Published online: 18 December 2003
PACS:
21.10.Re Collective levels - 21.60.Ev Collective models - 25.55.Kr Charge-exchange reactions - 27.30. + t \(20 \leq A \leq 38\)
H. Fujita: Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
J. Kamiya: Present address: Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan.
T. Wakasa: Present address: Department of Physics, Kyushu University, Higashi, Fukuoka 812-8581, Japan.
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Shimbara, Y., Fujita, Y., Adachi, T. et al. Suppression of Gamow-Teller and M1 transitions in deformed mirror nuclei 25Mg and 25Al. Eur. Phys. J. A 19, 25–31 (2004). https://doi.org/10.1140/epja/i2003-10115-2
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DOI: https://doi.org/10.1140/epja/i2003-10115-2